Preheater



May 6,' 1930.

F. PUENING PREHEATER 4 shets-sneet Filed June. 9, 1927 INVENTOR .NNI

ATToRNE F. PUENING l PREHEATE'R Filed June 49. 1927 4 sheets-sheet 2 Mas, 1930.

xxi-@awa1930. F; PUENING .11,756,99

PREHEATER Filed June 9, 1927 i 4 sheets-sheet 3 INVENTOR F.V PUENING May 6, 1930.

PREHEATER Filed June 9. 1927 4 Sheets-Sheet 4 QINVENTOR.

Patented May y6, `1930Y Y A UNl'TEDgSTAT-Es PATENT OFFICE.

My invention relatesV to heating apparatus l A V/ratus as may be used for the'preheatingof coal or similar materialsgl p l `My invention has for one ofits objects to provide heating apparatus ofthe character indicated above, hat shall be highly eicient and continuous in operation. I f

. ncreased surface area for contact With heating gases. n.. Y

A further obJect of my, invention 1s to heating surfaces are .flexible whereby they nay expand or contract Without dlstortlon of the supporting means therefor.

of which is accessibleto `entrance the op# erator for the purpose `of dislodging any Inaterial that may adhere tothe heating surfaces in ease of overheating, as fin the case of coal.- 275 has been difficult to secure sufIicientareaof the container for Without providing Y large andgexpensivej It: has been difficult, also,to so directtheheating gasesthat they are in contact With'thecont'ainertobe heated- Y throughouta path thatV is of sufficient-length i *to eicient-lyfutili'ze the heatfloflthejheatingj gases.

to' be heated that Vis{surfrunded' byk Van en- 44@ closing casingthrough Which-hot gasesmay be circulated.,- The outerY surface lofthe con.-r

taine'r is'provided With indentations or com` vvolutionswhereby the surface area for contact with thel gasesis Vmateriallyrincreased and the volume of-metal that may beused to transmit heat is increased' correspondingly. Y Theenclosing casing. :is fprovided with suitable baiiles whereby .theh'ot gases are: vcaused -totraverse atortuous path.`V`lr and it has particularfrelationto such appa-1 Wh paratus embodying my invention;

A further object of my invention isto prof videheating apparatus thatshall bev compact in structure and which shall providel provide a preheating deviceV in which the Al still-further object of invention isv to provide a `preheatingdevice`, the interior In heatingr `apparatus employed for, lthe purpose of prelieating and similar; usesg, it 'f the material to be'V heated.

a structure that? is 'unduly'` i means-off ajournahbearing .bearingtf The materiali-o' be'fhe'ated is supf f In accordance with the present invention,`

I provideV preheating apparatus which com-f prises a rotatable container forthe materialv My invention Willnow be described in con# FRANZ 1 UENING, or @HARAv TOWNSHIP, ALLEGHENY COUNTY, PENNSYLVANIA l *l l 1-Rn1=rsalmnalV l* 'M Appiiatinmea Jung 9, 1927. y.serial No. 191,544.

nec'tipln with thev accompanying drawings, in

Figure l is av view, partially in side elevation and partially in vertical section, of ap- 55 Flg. 2 is a View, in horizontal section, taken on-thek line ,II-II of Fig. l, of a portion of the casing," r'

3 isa View, in transversevertical sectlon, taken on the line`III-'-I`II of Figj l;

yFigft is asimilar view, taken onthe line IV-IV" of Fig. l;

, Fig. V5 is a vsimi V-VofFig. 1;?

VFig'. 6 is a View, inhorizontal section, taken 65 on theline VI-VI of Fig. l;

Fig. 7 is a View, in longitudinal section, ofV aportioncof a'modi-fled apparatus;

Fig. 8 is a similar view of a `further modiar view, taken on the line fication;I 70 I v9 is a fragmentary View of a still further'modication; y Y y Fig. ,10 is a fragmentary viewof a portion of the lapparatus of Fig. l',ifllustrating the gradation of Widths'ofthe disks. l 75 the heating apparatus embodyingvmy invention comprisesja kstationary casing or enclosure 1- thatjmay ybefof refractory vmaterial or othersuitable heat-insulating material, 'and a 8G f container 2-`thatfisrotatably mounted 4by w3` and va roller Referring to Figs. l to 6 ofthe drawings, z

pliedtothecontainer 2 by means of A'ahopper r fascrevv conveyor 6. Y -f g 85 5 Thecontainer 2 may be rotated by vany suitable powerdevice (not'shown)l Yby -means* stitute thebearing'4..l A bevelled roller l()l thatis'adapted-to-bear against an inclined portion fll'fof the ring 8 constitutes a thrust bearing for the :container 2. Y As best shovvn in Figs.A 3, YLland 6 the casing l 1s adapted for the circulation of hot gasesgtherethrough in such .manner as to pro-v` videa tortuouspathl The 'casing l is OfrecAV tangulajr"shape in crossfsection and the space therein .isgofsfimilar shape eXceptfor thejbaf-V 31u11 Y Vcenter of one side of the casing 1 and adj acent the base thereof and is connected, by

means of a passageway 14, to the interior of the casingat its left end7 aslviewed in Figs.V

1, 2 and ..6 of the drawings.

The space the container within the casing 1v surrounding 16 which have openings 17" and 18 respectively therethrough placed from each other, as will be noted by a comparison of Figs.V 3 and Ll. The baiiies'l and 16 are integral with or securely connected to the walls of the container 1. Their inner peripheries extend closely adjacent toL the y outf-zrpperiphery'v of tnc container 2. An outi the .various stages y let' opening ries of spaced f girder structure.V -V

19 is provided for the waste gases. The top 20 of the casing, which isplaced in position after Y the form of the well-known Detrick arch.

The container 2, comprises` a central body ,portion 21. that ,isf substantially square 1nY cross-section and which extends through the end walls of the casing 1. .It is connectedaat the-right-hand end thereof, as viewed in Fig.

V1,7to a flange 22 of a casting 2 3. KThefleft handend of the casing 2 extendsfa considerable distance beyond the Vend of thecasing 1 andthrough the*` gear 7 and ring'8-a11d is provided with l au `,central outlet opening 24. Surrounding the central portion 21" are a setions to provide a y through the body portion 21 and whichc'om- Y `municates with. each of the spacesin the hollow disks 25.1- The corners of the square passageway thusprovidedi are `,reinforced by an- Agle bars 27 toioonstituteV in effect .lacentral Thefwidth .of thehollow. 2:5...may decrease towardthe outletend of "the apparatus since the material .to be treated .becomes drier and ymorefluent .asV it progressesthrough of heating, It `.will beY noted,however,that the hollow disks 2(5withy, the baffles 15 and 16 are"substantially,the same width" as the baliles in y @directing the flow of hot gasesithroughthe orderto 'assist in s The structure shown in .lfigfldiffers,fromV that of Fig. 1 inthat'- the; angle .-bars- 27 l arey V'connectedjby .diagonal braces 28. which creaseftherigidity of the girderfstructure Ywithout materially increasing its weightfand without diminishing its accessibility. q Spac-V ing'members 29l are also providedhetween the angley bars. 27 and the ksurrounding hollow disks wherebythe hot surfaces ofthe latf Y `ter are not Vincontactwith the girder struc- V`turey,V z -y In the` structurefof'jFig. 8;'*the` number of 'braces 28 in the girder structure is materially 2 is divided into three .substan-V tiallyequal-partsjby meansof baflieslv and that vare angularly1dis ling 1 yto be heated is suppliedto thelhopper 5 and thevcontainer 2 is in place', has

Vconveyor 6, the rotation of'thefcontainerwill v l closed, the kcoal must moveto the leftltoward hollow annular members or` 'and into Vthe anmllm disks disks 25 thatare eonnectedatth'eir inner por-v continuous passagewaythe. coal` emergesY opening'24, ithasattainedateinperature of Y 4 g approximately.#50110 5009 F.,l to 'which' tem be Vsafely*heatedandVv dried 1 s viously4 describedpstructures. v

When theheating apparatus 'is mounted in e y positiomit is inclined slightly downwardly to the left, or outlet Vend, as viewed in Fig. 1 ofl-thefdrawingn order to facilitate the peassage of coal or'other material. therethrough.

Hot gasesl are andaroundthe container-2 until sulficient heat is stored-inV the latter to begin operations.V Pulverized coalfor other material is ycarrie'diby the Vconveyor'y 6 into the inlet' end of thecontainerj2. Thecontainer 2, which is rotated by means of the` gear wheel 7 ,constantly presents va changing outer surface to thehotgases, whereby heat is stored within the metal walls and is conducted by them `to the coal` within'the container. Y The coalV gradually tainer. by reason 'of itstendency to 'seek itsv levely and, L,alsoy by reason of the slight inclination'of the` airis of the container., 'y

Inasmucjh as the coal is supplied at substantially the axisof thecontainer '2 by the circulated through the casl' progressesthrough the eonv facilitate-the flowhof lthe.coalin,seekingits' f level. The right endofftlie container ,beingkfY The inclination ofl thievaXis ofpthecontainer insures ythe progression .of the Acoal.through A the` container V to the outlet2y4, Any tendency of the coal,k

to-.form eakesor lumpsfis opposedby the l girders through which the coalfallssince any-lunipjslwouldbe broken by the numerousv VVimpacts Vagainst the sidesor edges oftheV girdermembersg ,5 ,I Y It -willbe noted that the'hottest gases 'are appliedto the portioniof the vcontainer adja'- cent .'the outlet opening; yand .the /gasesgarei coolest near.,l the inlet opening where they are'.V 'Uff in contactwitghthe coldfcoal: 'This'arrange' i mentinsur'esy 'that therei is a si'lbstantially uni- Y form temperature kdifferential at all p artsof -the,preheating-japparatusl from the'y .outletf peraturegit Y r y without driving v o'ffanyY of the volatile prodi uctsk ofV the r'c'oal.' 'Th'e' coal -is then in .condi-31Tk amount of metal for heat transfer purposes tion to 'be supplied to`r low-temperature car-` 1. f l ybonizing machines orapparatusv or tohighy o Y lThis I ar'-,V Vrangementprovides substantially amaximum x lar cross-section, a hollow cylindricalcontain` Y j er supported by and surrounding framework, y l

p ily. Y

The large central opening provided by the i `hollow girder structure permits'anfoperatorV that is consistent withtheoperation of apparatus of reasonable and practical dimensions. The eiiiciency of the apparatus is, according# ly, very high, Asince substantially the maxi-i' mum amount of heat may be extracted from thehot gases during their travel through the casing. permit expansion and contraction ofthe [conf tainer 2 in accordance with the temperature (i conditions and they also transmit heat read-k to enter the interior and to dislod 'e'any material adhering to the side wallsvo the hollow disks or otherpportions of the structure. A bar or other suitable material may be used. through the openings in the girder structure.

While I have described my invention in connection with the preheating of coal and similar material, it will be rappreciated by those skilled in the art relating to heating apparatus that its use'is not limited thereto, My invention vmaybe embodied in various forms within the scope of the appended n claims.

I claim as my invention:

l. Heating apparatus comprisingia central hollow girder structure,a hollow container surrounding said girder, spaced therefrom, and supported thereby and comprising a plug rality of spacedhollow disks, and means for heating said container'. 2. Heating apparatus comprising av container consisting of a plurality of alined hollow disks the interiors of which are connectedV at their central portions, said container having an inlet and an outletfopening, and the f width ofcertain of said disksjbeing narrower` as they lapproach the outlet opening.

material, comprising a hollow rotatably mounted girder structure having openings in its side walls for the-passage of said ma- L terial therethrough, a substantially cylindri! cal Y container surrounding saidV girderf'v intermediate the ends thereof, the vouter eyliiidri call wall of said container having a plurality ofrelatively deep, hollow lannular portions,t Y A means for connecting 'said fgirder and-said cylindrical container, means .for feedinglma" Y terial to be heated tosaid container and means for heating said container. Y

Ll. Heating apparatus comprisinga centralffY hollow framework ofV substantially/j rectangut l and means for heating said container.

Initesitminiy whereofhavhereunto sub1* i scribed myname this 7th day OfJune), 1927. ,FRANZiPUaNma-Q The relatively thin hollow disks CERTIFICATE 0F CQRRECTION.

Patent No. 1,756,991. Granted May 6, 1930, to

FRANZ PUENING.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 16, for the Word "container" read "casing", and line 29, for the word "casing" read "container"'; and that the said Letters Patent should he read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 24th day of June, A. D. 1930.

M. J. Moore,

(Seal) Acting Commissioner of Patents. 

